MIMOProxyGuard

As previously mentioned, the management of MIMOProxy's permissions has been delegated to the MIMOProxyGuard, which is deployed through the Openzeppelin Clones library in the MIMOProxyFactory for each MIMOProxy.

Having the permission management outside the MIMOProxy reduces the risk of storage collision, and having a separate contract for it enables easy permission clearing. In the event of an ownership transfer of the MIMOProxy, a new owner will likely want to clear existing permissions for security reasons (e.g., malicious action contracts may have been granted permissions before the transfer). However, due to the granularity of permissions, it would be difficult and expensive to remove them one by one. With the MIMOProxyGuard, a user can simply clone a new MIMOProxyGuard, which will not have any permissions set.

Write Methods

initialize(address proxyFactory, address proxy)

Initializer function to set state variables upon cloning.

Param Name	Type	Description
proxyFactory	address	MIMOProxyFactory address
proxy	address	Address of the MIMOProxy linked to the contract

setPermission(address envoy, address target, bytes4 selector, bool permission)

Gives or takes a permission from an envoy to call the given target contract and function selector on behalf of the owner.

Requirements :

• Caller must the owner of the set MIMOProxy or the MIMOProxy

Param Name	Type	Description
envoy	address	The address of the envoy account
target	address	The address of the target contract
selector	bytes4	The 4 bytes function selector on the target contract
permission	bool	The boolean permission to set

View Methods

getPermission(address envoy, address target, bytes4 selector)

Returns the permission for specific envoy, target and selector.

Call Params

Name	Type	Description
envoy	address	The address of the envoy account
target	target	The address of the target contract
selector	selector	The 4 bytes function selector on the target contract

Return Values

Name	Type	Description
permission	bool	true if envoys is allowed to perform the call and false if not

getProxy()

Returns the address of the MIMOProxy associated with the MIMOProxyGuard contract.